IL9 and tuberculosis: In previous studies other genes, such as ASAP1 (ArfGAP with SH3 domain, ankyrin repeat and PH domain 1), IL9 (interleukin 9), WT1 (WT1 transcription factor), ADAM12 (ADAM metallopeptidase domain 12) and MFN2 (mitofusin 2), have been shown to associate with TB (16,17,20–22).